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供人员安全疏散用的楼梯间和室外楼梯的出入口或直通室内外安全区域的出口。即通向安全区域的出口。室内安全区域包括符合规范规定的避难层、避难走道等,室外安全区域包括室外地面,符合疏散要求并具有直接到达地面设施的上人屋面、平台以及符合规范要求的天桥、连廊等。
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radiation biological effectiveness
radiation biology
radiation breeding
radiation breeding in trees
radiation breeding of mulberry
radiation breeding of peanut
radiation breeding of silkworm
radiation budget at the top of the atmosphere
radiation bulk polymerization
radiation-burn combined injuries
radiation calculation
radiation calorimeter
radiation cataract
radiation chemical engineering
radiation chemical measuring methods
radiation chemical reaction
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radiation chemical yield; radiation chemistry yield
radiation chemistry
radiation chemistry of aqueous solution
radiation chemistry of biological materials
radiation chemistry of gas
radiation chemistry of organic compounds
radiation chemistry of polymers
radiation chemistry of solid
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